Check assembly dependency versions before loading in WinPS

src/PowerShellEditorServices.Hosting/EditorServicesLoader.cs

@@ -131,15 +131,15 @@ public static EditorServicesLoader Create(
 
                 // First look for the required assembly in the .NET Framework DLL dir
                 string baseDirAsmPath = Path.Combine(s_psesBaseDirPath, dllName);
-                if (File.Exists(baseDirAsmPath))
+                if (RequiredAssemblyExists(baseDirAsmPath, asmName))
                 {
                     logger.Log(PsesLogLevel.Diagnostic, $"Loading {args.Name} from PSES base dir into LoadFile context");
                     return Assembly.LoadFile(baseDirAsmPath);
                 }
 
                 // Then look in the shared .NET Standard directory
                 string asmPath = Path.Combine(s_psesDependencyDirPath, dllName);
-                if (File.Exists(asmPath))
+                if (RequiredAssemblyExists(asmPath, asmName))
                 {
                     logger.Log(PsesLogLevel.Diagnostic, $"Loading {args.Name} from PSES dependency dir into LoadFile context");
                     return Assembly.LoadFile(asmPath);
@@ -394,5 +394,20 @@ private static object GetPSVersion()
                 .GetMethod("get_PSVersion", BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic)
                 .Invoke(null, new object[0] /* Cannot use Array.Empty, since it must work in net452 */);
         }
+
+        private static bool RequiredAssemblyExists(string assemblyPath, AssemblyName requiredAssembly)
+        {
+            try
+            {
+                AssemblyName foundAsm = AssemblyName.GetAssemblyName(assemblyPath);
+                return foundAsm.Equals(requiredAssembly);
+            }
+            catch
+            {
+                // Do nothing
+            }
+
+            return false;
+        }
     }
 }